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Dust acoustic instability with non-extensive distribution

Published online by Cambridge University Press:  20 August 2012

SAN QIU LIU  and
HUI BIN QIU
SAN QIU LIU
Affiliation:
Department of Physics & School of Materials Science and Engineering, Nanchang University, Nanchang, 330047, China (sqlgroup@ncu.edu.cn)
HUI BIN QIU
Affiliation:
Department of Physics, Nanchang University, Nanchang, 330047, China
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Abstract

The instability of dust acoustic waves driven by electrons and ions with different drift velocities in dusty non-extensive plasma is investigated based on the kinetic theory. The non-extensivity parameters of non-extensive distribution for three plasma components are different from each other. The instability growth rate is shown to be dependent on the non-extensivity parameters as well as on the ion--electron number density ratio. In the extensive limit (q=1), the result in Maxwellian distribution plasma is recovered. The instability growth rate is found to decrease as the population of suprathermal electrons and dust grains increases, but it enhances when the number of suprathermal ions increases and electron density decreases.

Type
Papers
Information
Journal of Plasma Physics , Volume 79 , Issue 1 , February 2013 , pp. 105 - 111
Copyright
Copyright © Cambridge University Press 2012

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